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Fig. 5. Swelling of a vesicle derived from the contractile vacuole complex of a
P. multimicronucleatum cell that took place after the vesicle had
previously decreased to its minimum size in an increased external osmolarity
of 1 mol l1 sorbitol. (A) A series of pictures of the
vesicle showing swelling. The white arrow in a points to the shrunken
vesicle. (B) Time course of swelling of the vesicle. Vesicle volume is
presented as the percentage of its maximum volume in the increased osmolarity.
Letters aj in B show the times when the pictures in the
corresponding frames in A were taken. The straight line is the linear
approximation of the increase in vesicle volume. Scale bar, 50 µm.